Zabbix

/*

** Zabbix

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software; you can redistribute it and/or modify

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

** This program is distributed in the hope that it will be useful,

** but WITHOUT ANY WARRANTY; without even the implied warranty of

** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

** GNU General Public License for more details.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

#include "telnet.h"

​

#include "common.h"

#include "log.h"

​

static char prompt_char = '\0';

​

static int  telnet_waitsocket(ZBX_SOCKET socket_fd, int mode)

{

    struct timeval  tv;

    int     rc;

    fd_set      fd, *readfd = NULL, *writefd = NULL;

​

    zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);

​

    tv.tv_sec = 0;

    tv.tv_usec = 100000;    /* 1/10 sec */

​

    FD_ZERO(&fd);

    FD_SET(socket_fd, &fd);

​

    if (WAIT_READ == mode)

        readfd = &fd;

    else

        writefd = &fd;

​

    rc = select(ZBX_SOCKET_TO_INT(socket_fd) + 1, readfd, writefd, NULL, &tv);

​

    if (ZBX_PROTO_ERROR == rc)

    {

        zabbix_log(LOG_LEVEL_DEBUG, "%s() rc:%d errno:%d error:[%s]", __func__, rc, zbx_socket_last_error(),

                strerror_from_system(zbx_socket_last_error()));

    }

​

    zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%d", __func__, rc);

​

    return rc;

}

​

static ssize_t  telnet_socket_read(ZBX_SOCKET socket_fd, void *buf, size_t count)

{

    ssize_t rc;

    int error;

​